patch 8.0.0489: clipboard and "* register is not tested

Problem:    Clipboard and "* register is not tested.
Solution:   Add a test for Mac and X11. (Kazunobu Kuriyama)
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index bc0eca5..ce39367 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -194,6 +194,7 @@
 	    test_pyx2.res \
 	    test_pyx3.res \
 	    test_quickfix.res \
+	    test_quotestar.res \
 	    test_retab.res \
 	    test_ruby.res \
 	    test_search.res \